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Fri Nov 4 07:11:23 1994 UTC (19 years, 5 months ago) by ram
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CVS Tags: sparc-tramp-assem-base, double-double-array-base, post-merge-intl-branch, release-19b-pre1, release-19b-pre2, merged-unicode-utf16-extfmt-2009-06-11, double-double-init-sparc-2, unicode-utf16-extfmt-2009-03-27, double-double-base, snapshot-2007-09, snapshot-2007-08, snapshot-2008-08, snapshot-2008-09, ppc_gencgc_snap_2006-01-06, sse2-packed-2008-11-12, snapshot-2008-05, snapshot-2008-06, snapshot-2008-07, snapshot-2007-05, snapshot-2008-01, snapshot-2008-02, snapshot-2008-03, intl-branch-working-2010-02-19-1000, snapshot-2006-11, snapshot-2006-10, double-double-init-sparc, snapshot-2006-12, unicode-string-buffer-impl-base, sse2-base, release-20b-pre1, release-20b-pre2, unicode-string-buffer-base, sse2-packed-base, sparc-tramp-assem-2010-07-19, amd64-dd-start, snapshot-2003-10, snapshot-2004-10, release-18e-base, release-19f-pre1, snapshot-2008-12, snapshot-2008-11, intl-2-branch-base, snapshot-2004-08, snapshot-2004-09, remove_negative_zero_not_zero, snapshot-2007-01, snapshot-2007-02, snapshot-2004-05, snapshot-2004-06, snapshot-2004-07, release-19e, release-19d, GIT-CONVERSION, double-double-init-ppc, release-19c, dynamic-extent-base, unicode-utf16-sync-2008-12, LINKAGE_TABLE, release-19c-base, cross-sol-x86-merged, label-2009-03-16, release-19f-base, PRE_LINKAGE_TABLE, merge-sse2-packed, mod-arith-base, sparc_gencgc_merge, merge-with-19f, snapshot-2004-12, snapshot-2004-11, intl-branch-working-2010-02-11-1000, unicode-snapshot-2009-05, unicode-snapshot-2009-06, amd64-merge-start, ppc_gencgc_snap_2005-12-17, double-double-init-%make-sparc, unicode-utf16-sync-2008-07, release-18e-pre2, unicode-utf16-sync-2008-09, unicode-utf16-extfmts-sync-2008-12, prm-before-macosx-merge-tag, cold-pcl-base, RELEASE_20b, snapshot-2008-04, snapshot-2003-11, snapshot-2005-07, unicode-utf16-sync-label-2009-03-16, RELEASE_19f, snapshot-2007-03, release-20a-base, cross-sol-x86-base, unicode-utf16-char-support-2009-03-26, unicode-utf16-char-support-2009-03-25, release-19a-base, unicode-utf16-extfmts-pre-sync-2008-11, snapshot-2008-10, sparc_gencgc, snapshot-2007-04, snapshot-2010-12, snapshot-2010-11, unicode-utf16-sync-2008-11, snapshot-2007-07, snapshot-2011-09, snapshot-2011-06, snapshot-2011-07, snapshot-2011-04, snapshot-2007-06, snapshot-2011-02, snapshot-2011-03, snapshot-2011-01, snapshot-2003-12, release-19a-pre1, release-19a-pre3, release-19a-pre2, pre-merge-intl-branch, release-19a, UNICODE-BASE, double-double-array-checkpoint, double-double-reader-checkpoint-1, release-19d-base, release-19e-pre1, double-double-irrat-end, release-19e-pre2, snapshot-2010-05, snapshot-2010-04, snapshot-2010-07, snapshot-2010-06, snapshot-2010-01, snapshot-2010-03, snapshot-2010-02, release-19d-pre2, release-19d-pre1, snapshot-2010-08, release-18e, double-double-init-checkpoint-1, double-double-reader-base, label-2009-03-25, snapshot-2005-03, release-19b-base, cross-sol-x86-2010-12-20, double-double-init-x86, sse2-checkpoint-2008-10-01, intl-branch-2010-03-18-1300, snapshot-2005-11, double-double-sparc-checkpoint-1, snapshot-2004-04, sse2-merge-with-2008-11, sse2-merge-with-2008-10, snapshot-2005-10, RELEASE_20a, snapshot-2005-12, release-20a-pre1, snapshot-2005-01, snapshot-2009-11, snapshot-2009-12, unicode-utf16-extfmt-2009-06-11, portable-clx-import-2009-06-16, unicode-utf16-string-support, release-19c-pre1, cross-sparc-branch-base, release-19e-base, intl-branch-base, double-double-irrat-start, snapshot-2005-06, snapshot-2005-05, snapshot-2005-04, ppc_gencgc_snap_2005-05-14, snapshot-2005-02, unicode-utf16-base, portable-clx-base, snapshot-2005-09, snapshot-2005-08, lisp-executable-base, snapshot-2009-08, snapshot-2007-12, snapshot-2007-10, snapshot-2007-11, snapshot-2009-02, snapshot-2009-01, snapshot-2009-07, snapshot-2009-05, snapshot-2009-04, snapshot-2006-02, snapshot-2006-03, release-18e-pre1, snapshot-2006-01, snapshot-2006-06, snapshot-2006-07, snapshot-2006-04, snapshot-2006-05, pre-telent-clx, snapshot-2006-08, snapshot-2006-09, HEAD
Branch point for: release-19b-branch, double-double-reader-branch, double-double-array-branch, mod-arith-branch, RELEASE-19F-BRANCH, portable-clx-branch, sparc_gencgc_branch, cross-sparc-branch, RELEASE-20B-BRANCH, unicode-string-buffer-branch, sparc-tramp-assem-branch, dynamic-extent, UNICODE-BRANCH, release-19d-branch, ppc_gencgc_branch, sse2-packed-branch, lisp-executable, RELEASE-20A-BRANCH, amd64-dd-branch, double-double-branch, unicode-string-buffer-impl-branch, intl-branch, release-18e-branch, cold-pcl, unicode-utf16-branch, cross-sol-x86-branch, release-19e-branch, sse2-branch, release-19a-branch, release-19c-branch, intl-2-branch, unicode-utf16-extfmt-branch
Changes since 1.16: +164 -1 lines
File MIME type: text/plain
Lock status: Locked ram
update for 17f.
1 Release notes for CMU Common Lisp 17f, ?? November 94
3 17f contains bug fixes, PCL enhancements, and support for three new platforms:
4 Sun SPARC/Solaris
5 SGI MIPS/Iris (no load-foreign)
6 DEC Alpha/OSF1 (no Motif or load-foreign)
8 The HPPA/HPux and Sun/Sunos 4.x platforms are still available. Distributions
9 are now gzip'd, not compressed.
11 Other highlights: Motif, load-foreign on Hp/Ux, image size improvements, MIT
12 loop, some documentation of some previously undocumented features.
14 [Also see the README file for platform-specific notes.]
16 Bug fixes to basic CL support:
17 -- Fixed ADJUST-ARRAY to not flame out on arrays containing a zero-length
18 dimension (hence having no elements whatsoever.)
19 -- In SIGNAL, bind *break-on-signals* to NIL even before doing the type test
20 so that we don't wedge the error system if the type is malformed or
21 undefined.
22 -- Fixed bugs with EOF handling in READ-LINE.
23 -- In DEFINE-CONDITION, don't warn about probable error unless both initarg
24 and initform are missing.
25 -- In OPEN, fixed :direction :io :if-does-not-exist :create to actually
26 create.
27 -- Fix problem in LOAD-FOREIGN where (especially on SunOS), the failure to
28 page-align loaded code caused errors when load-foreign was done more than
29 once.
30 -- In OUTPUT-INSTANCE, check for the layout being invalid before calling the
31 print function, since the print function might error.
32 -- Closing composite streams (broadcast, etc.) no longer closes the component
33 streams.
34 -- Fixed pprint goof that didn't actually break anything, but wasted effort.
35 -- (COERCE x 'FLOAT) now convert to a single-float (instead of being an
36 error.) Also, we now check that numeric coercions actually return a value
37 of the specified type (which they might not if the type is not a symbol,
38 e.g. (coerce 0 '(complex float)). Possibly these should "do the right
39 thing", but it seems better to error than quietly do the wrong thing.
40 -- Fixed a bug in FLOAT-BIGNUM-RATIO that could cause an assertion failure
41 when floating particular bignum ratios (or possibly reading particular
42 float values.)
44 Miscellaneous enhancements:
45 -- LOOP is now the MIT/Symblics loop, so whatever it does is by definition
46 correct and The Right Thing.
47 -- PURIFY is now exported as EXT:PURIFY. This function can greatly improve
48 the GC performance of many large programs by moving code and static data
49 into non-collected storage. This is a "poor man's generational GC".
50 Environment compaction now done by purify.
51 -- Some reduction in the size of the image (and of GC scanned memory) from
52 tweaks to build process.
53 -- Binary input can now be done from string streams (from David Axmark.)
54 -- Debugger no longer aborts printing of a frame when printing one arg gets an
55 error (from Harris.)
56 -- LOAD-FOREIGN support for HP/Ux (from TSM.)
57 -- Add sap-ref-64 (only on Alpha).
58 -- Changes to EVAL, ROOM and site-init to work better in a runtime core image
59 (without the compiler loaded.)
60 -- *BEFORE-SAVE-INITIALIZATIONS* is now actually done before saving.
62 Compiler:
63 -- Fixed some problems with multiple values and cleanup code in byte
64 compilation. Also added EXT:*COMPILE-PROGRESS* printout.
65 -- Fixed some problems with internal errors when a function was just
66 declared to be FUNCTION.
67 -- Now allows stream args to compile-file and doesn't attempt to constant-fold
68 pathname functions (which depend on *default-pathname-defaults*.)
69 -- Fixed a case where dead local function in top-level code could cause an
70 internal error.
71 -- Fix compiler-macro expansion to correctly handle macros that pass (by
72 returning the unmodified form.)
73 -- Fix spelling of :COMPILE-TOPLEVEL and :LOAD-TOPLEVEL in EVAL-WHEN.
74 -- If compile-file is :block-compile T, the entire file is block-compiled as a
75 unit (even if it contains embedded START-BLOCK/END-BLOCK declarations.)
76 -- Virtually all of the compiler is now compiled without type checking, giving
77 some space and speed benefit.
79 CLX:
80 -- Merged with CLX R5.02 (no substantive changes).
81 -- In read-resources, trim off spaces, tabs, and "'s in #include file name
82 -- If CLX is compiled when PCL is loaded (as is now done in the binary
83 distribution), DRAWABLE, WINDOW and PIXMAP will be defined as PCL classes
84 (which can be subclasses.) This is compatible with various CLX-based
85 toolkits.
86 -- Fix some CONS declarations to be LIST because they aren't conses on the
87 last iteration (when the body isn't executed.)
88 -- Fix incorrect slot type declaration for DISPLAY-AUTHORIZATION-DATA.
89 -- Changed holding-lock not to turn off GC, which could cause event handlers
90 and other code to run for ling periods of time without garbage collecting.
91 Instead we bind all the GC hooks to (), since it was their invocation that
92 could cause bad recursive entry of CLX.
94 Hemlock:
95 -- Fixed problem in Hemlock recursive error handler (hadn't been properly
96 updated for ANSI conditions.)
97 -- Add ignore handler for client-message events.
98 -- Deleted some setting of hi::*hack-hunk-replace-line* to T, since we may
99 want it explicitly disabled in the init file.
100 -- Dylan mode now infix-oriented.
102 Motif interface:
103 -- Fixed a bug in the generation of Interface.h which was preventing motifd
104 from being successfully compiled on HP/Ux, Solaris, ...
105 -- use pcl::precompile-random-code-segments to minimize run-time compilations.
106 -- Add INVOKE-TTY-DEBUGGER. Don't try to invoke motif debugger if we didn't
107 succeed in opening a connection.
108 -- Print warning in status hook when server dies.
109 -- Made server to fflush after all output so that we see motifd output
110 when it is run on a pipe.
111 -- Fixed severely broken INSPECT-CLOS-PANE according to patch from Marco
112 Antoniotti.
113 -- Fix from Marco Antoniotti to actually remove handlers from the table in
114 remove-event-handler.
115 -- Fix to TOOLKIT-WRITE-VALUE to allow it to write either signed or unsigned
116 word integers.
117 -- Improved error recovery and internal error reporting.
119 PCL:
120 -- Structure-object is now no longer shadowed in PCL. Code that was using
121 PCL::STRUCTURE-OBJECT will now work better.
122 -- BUILT-IN-CLASS, CLASS-NAME, CLASS-OF and FIND-CLASS are once again exported
123 from PCL. This will cause a name conflict if anyone use-package's PCL, but
124 this will at least warn about the distinction. Probably you shouldn't
125 USE-PACKAGE PCL for this reason, but you can now say PCL:FIND-CLASS instead
126 of PCL::FIND-CLASS. It is also possible to use SHADOW or SHADOWING-IMPORT
127 to resolve the conflict.
128 -- Fix to update-instance-for-different-class.
129 -- When updating arg-info slots, check to see if the value is already there.
130 This can reduce non-shared pages.
131 -- Improved handling of invalid structure instances.
132 -- Fix a problem with PCL clobbering byte functions when setting their names.
133 -- New parameterized version of use-dispatch-dfun-p which avoids pessimizing
134 GFs with many methods.
135 -- Fix to :after methods on accessor functions. Also, fixed some problems
136 with the result of get-secondary-dispatch-function1 when there are no
137 methods.
138 -- Add compiler-macro for pcl:find-class which does lookup at load-time
139 when the name is a constant.
140 -- Definitive tweak for handling function-p in
141 compute-secondary-dispatch-function1 which avoids an infinite recursion.
142 -- When signalling an incompatible superclass error, added a hint to the
143 message to check out VALIDATE-SUPERCLASSES.
145 Lisp code:
146 -- Fixed Sparc GC bug fix (L2 never scavenged.)
147 -- On all non-Mach platforms, changed the default for CMUCLLIB to be
148 /usr/local/lib/cmucl/lib.
149 -- On SunOS, added "dynamic segments" patch which prevents the "out of
150 segments" errors that could happen when a Lisp memory management table
151 overflowed.
153 Build tools:
154 -- Fix compilation of motif interface to actually generate the C header files
155 Interface.h, etc.
156 -- Some changes to reduce compiler warnings
157 -- In compile-all, -clean and -noupdate have been flushed. -clean is now
158 done by the clean-build script.
159 -- Add some scripts from David Axmark that automate the entire build process:
160 tools/variant-lisp
161 tools/build-and-install
164 Release notes for CMU Common Lisp 17e, 11 March 94
166 17e is primarily a bug-fix release. This release is also available on
167 Hewlett-Packard 700-series workstations running HP/UX version 9.x.
168 The main missing feature on HP/UX is LOAD-FOREIGN.
173 Enhancements:
174 -- The function EXT:PURIFY is now exported. This was formerly only
175 documented as usable via the :PURIFY argument to SAVE-LISP. Great
176 improvements in GC runtime and memory use can be obtained when PURIFY is
177 called after loading in large amounts of code or creating large
178 datastructures that are unlikely to become garbage.
179 -- EXT:PURIFY (and thus (EXT:SAVE-LISP ... :PURIFY T) now compact the
180 hashtables representing the global namespace. Formerly this feature was
181 undocumented and only used during the initial system build.
182 -- There is now a "runtime" version of the Lisp image which omits the
183 compiler and loads some other code byte compiled, giving a 60% size
184 reduction. See README file, "Runtime distribution" section.
185 -- Changed the byte-function and byte-closure funcallable-instances to use
186 &more args instead of a &rest arg (eliminating the main source of
187 grautitous consing in byte code.)
188 -- Allow pretty-printer to work without compiler loaded.
189 -- Improved (and thus changed) the SXHASH of lists and other composite
190 objects.
191 -- Added to *FEATURES* all of the ANSI CL features that seemed plausible.
192 Any non-ANSI compliance is now a bug, not a feature...
193 -- Picked up Miles' changes to apropos and apropos-list that allows one to
194 supply NIL for the package, meaning all packages.
196 Bug fixes:
197 -- In SIGNAL, bind *break-on-signals* to NIL even before doing the type test
198 so that we don't wedge the error system if the type is malformed or
199 undefined.
200 -- Fix arg ordering for GETF in new condition support. Default the name
201 slot in DEFMACRO-LAMBDA-LIST-BIND-ERRORS to NIL (instead of leaving it
202 unbound.)
203 -- In READ-N-BYTES, only signal EOF when we read and got 0 bytes, not
204 whenever read returns less than we wanted. Also, fix the case of small
205 reads with an empty buffer not to leave garbled buffer pointers if we have
206 to do more than one read. These bugs mostly affect the X interface and
207 its users (Garnet was having problems.)
208 -- Changed YES-OR-NO-P and Y-OR-N-P to force output.
209 -- Fixed COUNT :TEST-NOT to actually negate the test.
210 -- Fixed COERCE to call type-expand so that people can coerce to deftypes.
211 -- Rename STEP to DEBUG::SET-STEP-BREAKPOINT because step is supposed to be
212 the exported step macro, not some internal routine.
213 -- Fixed DEFPACKAGE to combine multiple use, export, and import options
214 correctly. Fixed the warning about no longer using some packages to
215 actually work.
216 -- Fixed GCD to correctly handle MOST-NEGATIVE-FIXNUM.
217 -- Flush Hemlock font change hack in default site-init.lisp, since it was
218 causing problems.
220 CLOS (PCL):
221 -- Add some hacks for coercing lisp:class objects to pcl:class.
223 -- Fix some problems with the LISP:CLASS class-precedence-list suddenly
224 becoming empty when a class is redefined.
225 -- Fixed SIMPLE-STRING to list STRING in the inherits list.
226 -- Fix to update-instance-for-different-class.
231 Enhancements:
232 -- Added a type inference method for LOG's result type.
233 -- Added support for "more args" which are like rest args, but don't cons.
234 This is used for calling into annd out of byte-compiled core and in the
235 PROFILE package.
236 -- Increase *inline-expansion-limit* from 50 to 200. Change "inline
237 expansion count exceeded" warning to be a note. Don't inline expand in
238 interpreted code.
240 Bug fixes:
241 -- Allow stream arg to compile-file.
242 -- Changed assert-definition-type to quietly ignore non function-types.
243 -- Allow stream arg to compile-file.
244 -- Deleted incorrect type declaration in process-1-ftype-proclamation.
245 Deleted test for function-type-p around call to assert-definition-type,
246 since this is now folded into the function. Previously several calls
247 weren't doing this necessary check.
248 -- Fix a problem where spurious argument types could be inferred for optional
249 arguments in byte-compiled code (caused yes-or-no-p to fail.)
250 -- Fixed an internal error related to tail local calls.
251 -- Fixed assertion failure about COMPONENT-NEW-FUNCTIONS with some inline
252 expansions.
253 -- Fixed (TYPEP X '(REAL ...)) to actually test against REAL, not NUMBER.
254 -- Fixed a problem where top-level MULTIPLE-VALUE-CALL forms could cause an
255 assertion falure.
256 -- Don't try to compile flow-graph components that are unreachable. This
257 avoids some internal errors when unreachable local functions are
258 deleted.
259 -- Fix problem with byte-compiling PROGV getting an internal compiler error.
264 Misc extensions:
265 -- Added an executable-only optional to EXT:UNIX-NAMESTRING so that we can
266 expand path:foo into the first executable in the path named foo, not just
267 the first file
268 -- Changed RUN-PROGRAM to only try to run executables, and to flame out if it
269 can't be found in path:.
270 -- Profile: use &more instead of &rest to avoid consing the &rest arg list.
271 Fixed PROFILE:REPORT-TIME to not choke if any of the function names are
272 not symbols (e.g. setf functions).
274 [NOTE: Motif server doesn't work on HP yet.]
275 Motif interface:
276 -- Added an optional STYLE arg to the graphical inspector to make the
277 function consistent with its doc string (as well as the old inspector).
278 -- Tried to make starting the Motif server more robust, or at least give some
279 intelligible error message.
280 -- Added some extra protection against recursive invocation of the windowing
281 debugger.
282 -- Don't try to invoke motif debugger if we didn't succeed in opening a
283 connection.
284 -- Print warning in status hook when server dies.
285 -- Made server fflush after all output so that we see output when it is run
286 on a pipe.
288 Hemlock:
289 -- Add window-buffer-hook for echo area buffer to make absolutely sure we
290 can't change the eacho area window to point to another buffer.
291 -- Give a sensible error message if we can't find the slave utility (e.g.
292 lisp) to run.
293 -- Restored the behavior of scribe-file to cd to the directory of the .mss
294 file before running scribe.
295 -- Change default fonts to be courier, flushing all mention of 8x13.
296 Remove font-setting in default site-init file, since it was causing
297 problems.
298 -- Add FILE-POSITION method for region streams so that the compiler's read
299 error recovery works for "Editor Compile Defun", etc.
300 -- When reading a file, set BUFFER-WRITABLE to T before doing anything so
301 that we don't get spurious read-only errors.
304 Release notes for CMU Common Lisp 17c, 19 September 93
306 17c is a new major release of CMU Common Lisp. An overview of changes:
307 -- New structure object representation and class support in the type system.
308 -- PCL better integrated with CMU type system.
309 -- New CLX, PCL.
310 -- Numerous ANSI changes.
311 -- Byte-code compilation option offers more compact code.
312 -- Improvements in compiler source-level optimization, inline expansion and
313 instruction scheduling.
314 -- New fasl file format (you must recompile.)
315 -- Calling of SETF functions is now efficient.
316 -- Speed and space tuning in the compiler and runtime system.
317 -- New TTY debugger commands support stepping compiled code.
318 -- A graphical debugger and inspector based on a Motif interface.
319 -- Changes in the startup code and SAVE-LISP increase portability.
320 -- Preliminary support for the HP Precision Architecture under HP-UX 9.0
321 (i.e. for HP 700 series.)
322 -- New User's manual. Note that the online Info document has not been
323 updated yet.
325 And of course, bug fixes...
327 Basic runtime code changes:
329 ANSI cleanups:
330 -- These functions are now defined:
336 -- The conditions FLOATING-POINT-INEXACT,
338 defined.
339 -- Logical pathnames are now implemented. (See "pathnames" below and the
340 user's manual.)
341 -- Allow :UNSPECIFIC and :WILD in all pathname slots where they should be
342 legal; don't always use a :MULTI-CHAR-WILD pattern.
343 -- Support for :COMPILE-TOP-LEVEL, :LOAD-TOP-LEVEL and :EXECUTE keywords to
345 -- #S readed no longer forces keywords into the keyword package.
346 -- Various changes to DEFSTRUCT described below.
347 -- IN-PACKAGE now prints a warning if any arguments other than the package
348 name are supplied and signals a correctable error if the package doesn't
349 exist yet.
350 -- DEFPACKAGE now tells you about inconsistencies between any existing package
351 and the DEFPACKAGE form.
352 -- Packages:
353 - DELETE-PACKAGE function added according to X3J13/92 specification.
354 Most operations on deleted packages signal an error.
355 - Changed IN-PACKAGE to conform to the new definition. But if you use an
356 old-style IN-PACKAGE, it will use the old behavior.
357 - Rewrote DEFPACKAGE to tell you about inconsistencies between the
358 package and the DEFPACKAGE form.
359 -- Conditions:
360 - Changed conditions to be non-structure (but also non-PCL) instances
361 that support multiple inheritance and the other required CLOS
362 operations. Removed SIMPLE-CONDITION hacks for simulating multiple
363 inheritance.
364 - DEFINE-CONDITION now corresponds to proposed ANSI CL, which is a subset
365 of DEFINE-CLASS syntax and is incompatible with the earlier KMP syntax.
366 Note that in particular, :INITARG and :READER options are now
367 effectively required on every slot.
371 macro. This provides a way to say that restarts are relevant only to a
372 certain condition.
373 - Added STYLE-WARNING and PARSE-ERROR conditions.
374 - Added report method for END-OF-FILE and changed system code to signal
375 it.
376 - Added PRINT-NOT-READABLE condition and made people use it.
377 -- Remove some spurious LISP package exports, and add missing ones.
378 Delete package setup for optional subsystems (hemlock, etc.)
381 DEFINE-SETF-METHOD to DEFINE-SETF-EXPANDER. The old names are still
382 defined for CLtL1 compatability.
383 -- Added degenerate versions of STREAM-EXTERNAL-FORMAT,
385 -- Hash-table code largely rewritten. MAKE-HASH-TABLE now conforms to
386 the X3J13 spec. Hash-tables can now be dumped as constants in fasl files.
388 Bug fixes:
389 -- Made the "modules:" search-list (used by REQUIRE) default to the current
390 directory.
391 -- Do a BOUNDP check so that references to undefined types inside of a
392 WITH-COMPILATION-UNIT but outside of the compiler won't cause
393 undefined-variable errors.
394 -- Set up a default for modules: search-list.
395 -- Changed BACKQ-UNPARSE to check for improper lists instead of getting an
396 internal error. Some meaningless backq forms will now pprint as:
397 "### illegal dotted backquote form ###".
398 -- Added SIMPLE-STYLE-WARNING, and spiffed up the simple-condition hacks so
399 that (typep x 'simple-condition) works.
400 -- In LOAD-FOREIGN, use unix-namestring on each file before passing it to the
401 linker to get rid of search lists.
402 -- Fixed the printer to stop at the fill pointer for strings with fill
403 pointers.
404 -- Fixed PPRINT-DO to not flame out if one of the binding lists is NIL.
405 -- Fixed load to not always consider files with NIL type to be source files.
406 If the file exists as specified, then look at the header instead of trying
407 to default the type. If :CONTENTS is specified, then don't try defaulting
408 types.
409 -- Fixed FORMAT-EXP-AUX to correctly handle variable width fields when the
410 argument is negative.
411 -- Use ~C instead of ~A when printing float exponent marker so that
412 *PRINT-READABLY* doesn't mess things up.
413 -- Fixed CLEAR-INPUT on file descriptor streams to flush any unread chars.
414 -- Now that +0.0 and -0.0 are no longer EQL, fixed ATAN to deal with them
415 correctly.
416 -- Changed SAVE-LISP to pad the core file out to CORE_PAGESIZE bytes, so that
417 when we mmap it back it, we won't get bus errors if the real page size is
418 less then the CORE_PAGESIZE.
419 -- Really really fixed GET-SETF-METHOD-MULTIPLE-VALUE for local macros. Also,
420 in the recursive calls, people were not propagating the environment
421 through, and in some places were not recursing with the multiple-value
422 version.
423 -- Fixed FLOAT to float ratios precisely by using integer division instead of
424 float division. This fixes a problem where a bit or two was lost on
425 READing floats.
426 -- In the Alien type= method for FUNCTION, call ALIEN-TYPE-= instead of
427 calling ALIEN-TYPE-P with two args. [Fix from Mike Clarkson.]
429 Compiler changes:
431 Enhancements:
432 -- If the argument to compile-file is already absolute, then don't bother
433 expanding it into the TRUENAME. This allows search-lists or logical
434 pathnames to be preserved in the defined-from info (for DESCRIBE, "Edit
435 Definition", etc.)
436 -- Signal a compile-time error for division by constant 0.
437 -- Replaced the FORMAT transform with one that uses FORMATTER for more
438 complete handling of format directives. This is only enabled when
439 speed > space.
440 -- Compilation to a dense byte-code is now supported, see below.
441 -- Semantic analysis/optimization of function calls has been revamped so that
442 optimizations are done more consistently, especially when the call is a
443 funcall.
444 -- A new approach is now taken to inline expansion, allowing inlining to be
445 done in more cases. In particular:
446 - local functions from LABELS or block compilation can now be inlined,
447 - global function definitions made inside of a local macro or special
448 declaration can now be inlined.
449 Inline expansion is now divided into two separate parts:
450 - Semi-inline expansion introduces a local definition of a global
451 function that has an expansion available. This is now exactly
452 equivalent to block-compiling together with that DEFUN.
453 - Local call analysis introduces new copies of locally defined INLINE
454 functions. This duplication is limited by EXT:*INLINE-EXPANSION-LIMIT*
455 (default 50) to prevent indefinite expansion of recursive functions.
456 This limit may need to be increased for compilations containing many
457 legit inline expansions in order for all calls to be inlined.
458 -- SETF functions are now better supported. Calling a compile-time constant
459 SETF function is now just as efficient as calling a function named by a
460 symbol. This is done by resolving function names to "fdefinition objects"
461 at load time. SYMBOL-FUNCTION of a non-constant symbol is now somewhat
462 slower, since the fdefinition must be located by a table lookup.
463 -- Assembler and disassembler have been reimplemented yet again, giving
464 improved portability and scheduling.
465 -- Assembly optimization is now enabled, giving large speed/space improvements
466 on MIPS and some on SPARC. This optimization is done when speed >
467 compilation-speed (i.e. not by default) since it significantly slows
468 compilation.
469 -- [mips] Lots of tweeks in order to use NIL and 0 directly from the
470 registers holding them instead of copying them into a new register and
471 then using it.
472 -- New funcallable-instance support (for PCL, etc.) Now funcallable instance
473 functions must be specially compiled, which is indicated by creating them
475 -- Moved assumed-type recording of unknown function calls from the beginning
476 of IR1 to the end so that we have the best type information about the
477 arguments.
478 -- Generalized the static-mumble-offset routines to also consider nil a
479 static symbol at offset 0.
481 ANSI changes:
482 -- Make compiler error functions use the condition system. This ANSI cleanup
483 has two advantages:
484 1] compiler-warning and warn are now equivalent, so uses of WARN will be
485 counted in the warning total and given source context.
486 2] user handlers can be defined to notice or suppress output.
487 -- Made DYNAMIC-EXTENT declaration recognized & ignored.
488 -- Allow non-keyword keyword names when the &key keyword is specified
489 separately. In FUNCTION and VALUES types, allow non-keyword symbols; you
490 must now explicitly the ":" in order to get the usual keyword naming.
491 -- Compiler-macros are now supported. See DEFINE-COMPILER-MACRO.
492 -- Minor tweeks to conform to X3J13 cleanup MACRO-DECLARATIONS:MAKE-EXPLICIT.
493 -- Fixed SYMBOL-MACROLET to allow declarations as per X3J13 cleanup SYMBOL-
494 MACROLET-DECLARE:ALLOW. When declaring things about symbol macros, type
495 declarations just wrap (the type ...) around the expansion, special
496 declarations signal an error, and ignore/ignorable declarations are
497 ignored.
499 Tuning:
500 -- Tuning based on instruction-counting profiling of the compiler --- added
501 missing declarations, etc. This also motivated some general
502 array/sequence optimizations (see below.)
503 -- Added block compilation declarations. Moved some stuff around to get
504 better locality.
505 -- Changed IR1-ERROR-BAILOUT to do fewer special bindings.
506 -- Inline expand some simple utility functions.
507 -- Some changes to increase the sharing among some of the automatically
508 generated functions in the compiler backend.
510 Bug fixes:
511 -- [sparc,mips] Fixed a bug in default-unknown-values where it wouldn't
512 default the first unsupplied value to nil if more then 6 values where
513 supplied.
514 -- Structure slot accessors are no longer constant-folded, because that was
515 causing problems with some MAKE-LOAD-FORM hacks.
516 -- Fixed numeric type inference to realize that contagion causes the result
518 -- In FINALIZE-XEP-DEFINITION, if not the current global definition, just
519 leave the defined type alone, instead of clobbering it with FUNCTION. A
520 benefit of this is that COMPILE doesn't trash the function type.
521 -- Don't run the back-end(s) on components with no code.
522 -- Don't compile load-time-value lambdas if they've already been compiled
523 because they ended up in a non-top-level component. Also, the function
524 holding a load-time-value form also has a more sensible debug name.
525 -- Fixed a problem with ASSERT-DEFINITION-TYPE when we have a keyword arg
526 with a non-constant default.
527 -- Fixed several uses of FIND to use EQUAL instead of EQL to compare function
528 names, because (SETF mumble) is now a valid function name, and isn't
529 necessarily EQL.
530 -- Bind *GENSYM-COUNTER* around compilation that it doesn't get side
531 effected.
532 -- Fixed a bug in type inference which seems to have generally prevented
533 anything from being inferred about function result types.
534 -- Fixed several bugs related to the handling of "assignment" local functions
535 (that correspond to a tail-recursive loop.)
536 -- Added a hack to IF-IF optimization to hopefully prevent some spurious
537 unreachable code notes.
538 -- Fixed call to CONTINUATION-DERIVED-TYPE to be CONTINUATION-TYPE so that we
539 don't choke on values types in the functional position.
540 -- Fixed the handling of +/- 0.0:
541 - = is no longer converted to EQL, but is directly handled by the backend.
542 - EQL is converted into a raw comparison of the bits.
543 -- Fixed several bugs which caused fatal compile-time errors.
544 -- Fixed LET* to correctly use the internal policy (not the interface policy)
545 for all bindings, not just the first.
546 -- In local call VOPs, must load CALLEE-NFP with MAYBE-LOAD-STACK-TN, since it
547 might not be in a register.
548 -- When iterating over the lamdba-calls in unconverting tail calls, have
549 to ignore any deleted lambda.
550 -- Fixed listify-rest-arg. It was leaving a tagged pointer to unallocated
551 memory in a descriptor register, which would confuse the garbage collector
552 if this value was still around.
553 -- Compile and dump package manipulation forms before evaluating them, so
554 they are dumped with respect to the state of the package system before the
555 form was read, not after.
557 Sparc:
558 -- New pseudo-atomic speeds allocation.
559 -- Added checking for integer division by zero.
561 Mips:
562 -- Changed generic-= and generic-/= to not assume that EQ implies =,
563 because it doesn't in the case of NaNs.
564 -- Major rewrite of many things. Merged mumble-immediate SCs into the
565 immediate SC. Wrote several vops to use :constant arg types better.
566 Rewrote all the type testing stuff. New pseudo-atomic, allocators now
567 inline.
568 -- Fixed UNBIND-TO-HERE to not dereference past the end of the binding stack.
569 -- Changed to load the function from static-function-offset relative to NIL
570 instead of computing the symbol and then loading the function.
571 -- Added Miles' change to use JALI instead of LI/JR now that it exists.
572 -- Fixed a lifetime bug in full call. This only showed up if there were
573 either a variable number or > 6 arguments and the caller was large enough
574 that the compute-lra-from-code couldn't be done in one instruction.
576 Byte compilation:
578 Byte compilation reduces the size of the Lisp process by allowing rarely used
579 functions to be compiled more compactly. In comparison with 16f, the basic
580 system image is about 20% smaller. The full system with Hemlock CLX, etc., is
581 also 19% smaller even though it contains new code (the Motif interface) because
582 a larger fraction of the extra systems are byte compiled.
585 Byte compilation overview:
587 The decision to byte-compile or native compile can be done on a per-file or
588 per-code-object basis. COMPILE-FILE now has a :BYTE-COMPILE argument. If T,
589 we byte-compile everything and create a machine-independent fasl file
590 (dependent only on byte order, file type "bytef" or "lbytef".)
591 If :MAYBE (the default, from EXT:*BYTE-COMPILE-DEFAULT*), things are
592 byte-compiled when speed = 0 and debug <= 1. Top-level forms are byte-compiled
593 by default (controlled by ext:*byte-compile-top-level*.)
595 Byte compilation is roughly twice as fast native compilation. Byte compiled
596 code runs 50x--200x slower than native code, and is 6x more dense. This is
597 about 10x faster than the IR1 interpreter, which is itself considered fast in
598 comparison to other Common Lisp interpreters. Historical perspective: this is
599 about as fast as Spice Lisp on a PERQ.
601 Tuning:
602 -- Tweaked GENSYM so that the CONCATENTATE is open-coded.
603 -- Tweaked WITH-ARRAY-DATA to test for (not (array-header-p )) instead of
604 (simple-array * (*)), since that's much faster. This helps all functions
605 that accept non-simple arrays.
606 -- Transform MEMBER, DELETE and ASSOC to MEMQ, ASSQ and DELQ when possible.
607 Inline expand vector & list POSITION, vector FILL and list DELETE-IF.
608 -- Add some INDEX declarations in simple-string concatenate/replace
609 transforms.
610 -- made DIGIT-CHAR-P and DIGIT-WEIGHT maybe-inline.
611 -- Added declarations from efficiency notes in fd-stream, load, package,
612 reader, char and hash.
613 -- Revived the support for FAST-READ-CHAR and the STREAM-IN-BUFFER, which
614 allows READ-CHAR and READ-BYTE to be done with 0 function calls rather than
615 2.
616 -- Because of above two changes, both the reader and the fasloader are now
617 significantly faster (reader 2x.)
618 -- Default (non-frozen) structure type tests are now significantly faster (no
619 function calls), and somewhat smaller. This and the reader improvement
620 have sped up the compiler somewhat.
621 -- Many debug-info and compiler data structures are now annotated as pure,
622 alloing them to be put in read-only space. This reduces the amound of
623 stuff in static space, speeding GC.
624 -- Real-valued hash-table parameters (rehash-threshold etc.) are
625 canonicalized to single-floats.
626 -- Replaced ISQRT with a much faster version off the net.
627 -- serve-event now uses UNIX-FAST-SELECT, so it can can handle >32 file
628 descriptors and is more efficient.
629 -- Changed UNIX-FAST-SELECT to a macro so that it can be efficient. Changed
630 FD-SET stuff to be efficiently compilable.
631 -- Use an auxiliary function to make the condition for macro arg count
632 errors to save space in macro definitions.
633 -- Byte compile the expander functions for all macros except those in the
634 cold load. Byte-compile various user-interface stuff like the debugger,
635 disassemble and structure print functions. Byte-compile most Hemlock
636 commands.
637 -- Compile PCL's guts unsafe when #+SMALL.
638 -- Some gratuitous RANDOM tuning. Random double floats are now much, much
639 faster. Added transforms for RANDOM to type-specific functions (which can
640 then be inline-expanded).
642 DEFSTRUCT and classes:
644 The structure representation has been changed to point directly to a type
645 descriptor rather than to the symbol type name. This allows faster type tests
646 and better GC support. Also, structure redefinition is now much more
647 conservative; formerly, many cases where code was compiled using differing
648 versions of the same structure were quietly ignored or resulted in strange
649 behavior. Raw allocation of typed slots dramatically increase the efficiency
650 of float-valued slots. Much of DEFSTRUCT has been rewritten, and is now
651 believed to be ANSI complaint.
653 ANSI changes:
654 -- Default defstruct keyword constructors can no longer reference argument
655 values in slot init forms. BOA constructors can still do this, so defining
656 a BOA constructor with all keyword args will have the old effect.
657 -- Class objects are now implemented, see FIND-CLASS, CLASS-NAME, TYPEP,
658 CLASS-OF. TYPE-OF is now based on CLASS-OF, and returns slightly different
659 results than before.
660 -- STRUCTURE-CLASSes now exist. See also the STRUCTURE-OBJECT type.
661 -- BUILT-IN-CLASSes also exist. In some cases CLASS-OF (legally) returns
662 non-standard subclasses of the standard class, e.g. for a float vector, the
664 now DEFTYPEs.
666 Bug fix:
667 -- Typed structures now have the correct (though rather odd) semantics of
668 :offset and :named when inclusion is done.
670 Raw slots:
671 -- Structure slots of subtypes of SINGLE-FLOAT, DOUBLE-FLOAT and
672 (UNSIGNED-BYTE 32) are now allocated in non-descriptor storage, and can be
673 read/written without number-consing overhead.
675 Type tests:
676 -- The default (non-frozen) structure type predicate is now significantly
677 faster (no function call) in the case where the argument is a structure
678 of another type or the type is a supertype of the object's type. The code
679 is also somewhat smaller.
681 Structure Redefinition:
682 -- Handing of structure redefinition is now much more comprehensive.
683 -- Definitions are only considered incompatible when slots have moved or been
684 added, slot types are changed to a type that is not a subtype of the old
685 type, or the inheritance structure has changed. Previously any change at
686 all would produce a warning.
687 -- When a change is incompatible, the default restart (CONTINUE) invalidates
688 old instances, constructors and predicate uses. When speed <= safety, a
689 LAYOUT-INVALID error will be signalled when obsolete instances are passed
690 to a type test (e.g. for type checking.) Use of old code on new instances
691 or old instances when speed > safety > 0 will result in type errors.
692 Other restarts allow you to ignore the redefinition or to clobber the
693 existing information, preserving the old code (in case the change is
694 actually compatible.)
695 -- If the structure length or inheritance structure has changed, an error
696 is signalled when you load code that was compiled with a different
697 structure definition than the one currently in effect.
699 Structure Internals:
700 -- VM:STRUCTURE-USAGE renamed to VM:INSTANCE-USAGE. Internally, the structure
701 type and accessors have also been renamed, e.g.
703 -- The non-standard STRUCTURE type has become has become EXT:INSTANCE. To
704 (portably) test whether something is really a structure object, do
707 PCL:
708 The largest changes are:
709 -- PCL port revamped to re-integrate PCL classes with the type system and to
710 more efficiently dispatch on structure and built-in types. Some
711 miscellaneous tuning. CLOS symbols are now exported from the LISP package,
712 so you don't need to USE-PACKAGE PCL anymore.
714 PCL notes:
716 The integration of PCL with the CMU CL type system has been substantially
717 improved. There are significant improvements in the speed of PCL generic
718 function dispatch of built-in and structure classes and TYPEP of PCL classes.
719 There should also be reduced run-time compilation (e.g. in the Motif
720 inspector) due to less use of non-precompiled dispatch functions.
722 The compiler now recognizes the PCL::CLASS declaration. This clues the
723 compiler in on PCL's knowledge of types (due to being a specialized argument
724 to a method.) CLOS class names are recognized as "real" types by the
725 compiler, not SATISFIES DEFTYPES. Note that LISP:CLASS is still not a PCL
726 class, so PCL needs to shadow CLASS and STANDARD-CLASS.
728 Fixed the #< print function to flame out if *PRINT-READABLY* is true.
730 Supply missing :INITIAL-ELEMENT NIL in MAKE-ARRAY call which can result in a
731 "0 is not a list" or "segment violation" error on redefining a class.
733 September-16-92-PCL-e has been incorporated into the CMU CL sources thanks
734 to Rick Harris. Merge fix to pessimization of GFs with many standard class
735 specializers but also some EQL or built-in class specializers.
737 Graphical debugger/Motif toolkit:
739 We have implemented a new interface to Motif which is functionally similar to
740 CLM, but works better in CMU CL. See:
741 doc/motif-toolkit.doc
742 doc/motif-internals.doc
744 This motif interface has been used to write a new inspector and graphical
745 debugger. There is also a Lisp control panel with a simple file management
746 facility, apropos and inspector dialogs, and controls for setting global
747 options.
749 Call INTERFACE:LISP-CONTROL-PANEL to create the control panel. When
751 environment variable is defined, the graphical inspector and debugger will be
752 invoked by INSPECT or when an error is signalled. Possible values are
753 :GRAPHICS and :TTY. If the value is :GRAPHICS, but there is no X display,
754 then we quietly use the TTY interface.
756 Debugger:
758 The command-line debugger now implements the breakpoint and step commands
759 described in the manual:
760 LIST-LOCATIONS [{function | :c}] list the locations for breakpoints.
761 Specify :c for the current frame. Abbreviation: LL
762 LIST-BREAKPOINTS list the active breakpoints.
763 Abbreviations: LB, LBP
764 DELETE-BREAKPOINT [n] remove breakpoint n or all breakpoints.
765 Abbreviations: DEL, DBP
766 BREAKPOINT {n | :end | :start} [:break form] [:function function]
767 [{:print form}*] [:condition form] set a breakpoint.
768 Abbreviations: BR, BP
769 STEP [n] step to the next location or step n times.
771 These commands provide a degree of support for stepping and setting
772 breakpoints inside compiled functions. The variables
774 verbosity of LIST-LOCATIONS.
776 Enhancements:
777 -- Changed PRINT-FRAME-CALL to print the source if verbosity >= 2 and
778 the source is available.
779 -- Changed source location printing to cache information so that it is much
780 faster when many locations in the same function are printed. The source
781 file is now only printed when the file changes from one printing to the
782 next.
784 Bug fixes:
785 -- Added explicit error checking to the debugger so that we don't get an
786 internal error (bus error in unsafe code, etc.) when attempting to display
787 source from a file that has been excessively modified.
788 -- Bind *BREAK-ON-SIGNALS* to NIL when we call BREAK in SIGNAL so that the
789 debugger doesn't recurse on itself.
790 -- Changed HANDLE-BREAKPOINT in the debugger to allow breakpoints that nobody
791 wants. This can happen if a function-end breakpoint was deactivated while
792 the function was on the stack, because there is no way to convert the
793 bogus-lra back into the real lra.
794 -- Fixed COMPUTE-CALLING-FRAME to not try using %CODE-DEBUG-INFO on
795 things that arn't code components.
796 -- Instead of doing after breakpoints in Lisp, use the new C function
797 breakpoint_do_displaced_inst. That way the C code can do different things
798 on different machines (like use single stepping if available).
801 Misc changes:
803 CLX:
804 We are now distributing version R5.01 of the CLX X library. Among other
805 changes, this is supposed to support the cookie-based host authentication
806 used by OpenWindows. Now compiled with the :CLX-ANSI-COMMON-LISP feature.
808 Pathnames:
809 -- Logical pathnames are now implemented and wildcard matching has been
810 generalized to make them useful. Any namestring beginning with HOST:
811 (where HOST is a defined logical host) will be parsed as a logical
812 pathname. If the prefix is not a defined logical host, it will be still
813 be parsed as a CMU CL "search list."
814 -- Pattern-matching on :WILD-INFERIORS is now implemented, but the
815 Unix code treats it pretty much like :WILD.
816 -- More error cases are detected in TRANSLATE-PATHNAME.
817 -- See new user's manual for CMU CL specific documentation.
819 Stream internals:
820 -- Deleted read-line methods. For simplicity, this rather unimportant
821 operation is now implemented using read-char.
822 -- READ-N-BYTES eof-error-p nil is now mostly non-blocking (it only reads what
823 is in the buffer, or what unix-read returns if the buffer is empty.) To be
824 sure it won't block, you must guard it with a LISTEN.
826 Extensions:
827 -- Changed the stream arg to DISASSEMBLE to be a keyword to avoid optional &
828 keyword lossage.
829 -- Changed PROFILE:PROFILE argument count determination to parse the function
830 type and look at it, instead of trying to fake it. Among other things,
831 this allows efficient profiling of functions with FTYPE declarations even
832 when compilation policy has caused the function-object's type to be
833 dropped.
834 -- Add :CALLERS option to PROFILE which records the most common callers
835 of each profiled function.
836 -- Add new "CPROFILE" package which does instruction-counting profiling with
837 the compiler's assistance.
838 -- Fixed DI:FUNCTION-DEBUG-FUNCTION to work on closures.
839 -- Added EXT:DO-HASH.
840 -- User-defined hashtable tests are now supported. There is a function
841 DEFINE-HASH-TABLE-TEST that takes three arguments: the symbol name of the
842 hash table test, the test function, and the hash function. It updates
843 *hash-table-tests*, which is now internal. The test function takes two
844 objects and returns true iff they are the same. The hash function takes
845 one object and returns two values: the (positive fixnum) hash value and
846 true if the hashing depends on pointer values and will have to be redone if
847 the object moves.
848 -- Added weak hash-table support.
849 - Removed (setf weak-pointer-value) and made make-weak-pointer itself the
850 compiler primitive in order to simplify the gengc port.
851 - Added stuff to fake scavenger hooks in the non-gengc system.
852 -- Moved the RUN-PROGRAM fork/exec stuff into C, for ease in porting.
854 Hemlock:
855 -- In DELETE-BREAKPOINTS-BUFFER-HOOK, if no wire (server died), then
856 don't do anything.
857 -- Changed BEEP flashing to use SLEEP 0.1 instead of DISPLAY-FINISH-OUTPUT
858 because this was causing recursive entry of CLX.
859 -- Fixed from debugger edit command "can't edit source" message not
860 spuriously reinvoke the debugger when invoked from the command line.
861 -- Fix initialization of print-representation attribute so that characters
862 >127 don't cause text to mysteriously disappear.
863 -- Flush carefully-add-font-path call. If people want library:fonts/ in
864 their font-path, they can put it there. This should eliminate the Hemlock
865 initialization error which would happen when using X remotely.
868 Changed SAVE-LISP to no longer save the stacks. Instead, when the core is
869 restored, a (supplied) initial function is invoked which can do whatever kind
870 of setup it wants. This makes a saved lisp totally independent of the
871 location of the C stack, and eliminates the "environment too big" error that
872 happened in some SUNOS environments. A consequence of this is that calling
873 SAVE-LISP terminates the currently running Lisp.
875 SunOS/SPARC:
876 Changed software-version to use /usr/bin/uname instead of stringing the
877 kernel.
879 Removed the load of bit-bash, because we don't want to have to support the
880 assemble routine versions.
882 Significant revamping of startup code (lisp now, not ldb.) The new startup
883 code has better breakpoint support and improved portability.
885 Added :CMU17 to the features list so that PCL can tell if it is in a
886 version 16 or a version 17 series core.
889 Release notes for CMU Common Lisp 16f, 11 December 92
891 The changes between 16e and 16f are almost exclusively bug-fixes. When we
892 announce a version 17 beta, 16f will probably become the default release
893 (replacing 15e). The PCL has been upgraded from "March 92 (2a)" to
894 "March 92 (2c)", which provides some bug-fixes; also, all of the patches in
895 the March-92-PCL-bugs file have been applied.
897 Enhancements:
898 -- PROVIDE & REQUIRE are now back in the system, since proposed ANSI CL has
899 reinstated them as deprecated features. See the doc strings for these
900 functions and EXT:DEFMODULE.
901 -- The SPARC dynamic heap size limit has been doubled from 64meg to 128meg.
903 Pretty printer:
904 -- Fixed a bug in pprint-let that caused to to barf on (let (nil) ...).
905 -- Fixed pprint-lambda-list to print a space before the dot when the tail of
906 the lambda list is shared. In other words, print (foo . #1=(bar baz))
907 instead of (foo. #1=(bar baz)).
908 -- Added an additional use of ~^ in pprint-flet so that (flet (nil) ...)
909 doesn't flame out.
910 -- Make pretty printer properly process pprint tabs when output is forced.
911 -- In format pprint logical blocks, fixed ~^ to act like
912 PPRINT-EXIT-IF-LIST-EXHAUSTED instead of blowing out to some containing
913 directive.
915 Compiler:
916 -- Fixed compiler internal error with dead-code deletion of top-level code.
917 -- Bind *gensym-counter* instead of setting it so that compiling doesn't
918 globally reset the gensym counter.
919 -- Fixed problem with interpreted LOAD-TIME-VALUE causing undefined function
920 VALUE-CELL-REF errors.
921 -- Preserve the arglist in interpreted functions for DESCRIBE, etc.
922 -- Gag bound-but-not-referenced warnings when the EXT:INHIBIT-WARNINGS
923 optimize quality is 3.
924 -- Fixed a problem with register allocation conflict analysis which appeared
925 when a function was called with ~>= 50 arguments.
926 -- Fixed bug with optimization of tail local calls.
927 -- Fixed interpreted PROCLAIM/DECLAIM to ignore
928 START-BLOCK, END-BLOCK and declared DECLARATION declarations.
929 Changed the unrecognized proclamation error to be a warning.
930 -- Fixed float heap allocation to not wedge when the store causes a trap
931 (SPARC only.)
933 Trace:
934 -- Added pretty-printer directives so that arg lists and results print better.
935 -- Fixed UNTRACE not to flame out when untracing untraced functions.
936 -- Fixed bug with redefining function traced with encapsulation (e.g.
937 interpreted functions.
939 Misc bug fixes:
940 -- Fixed I/O timeout handling (e.g. for CLX) to correctly borrow from the
941 timeout seconds when computing the new value for the timeout microseconds.
942 -- Restored proper (prompt) handling of queued CLX events in SERVE-EVENT
943 -- Alien enums always take up an int to be compatable with C. Also,
944 sort the from-alist so that enum aliens are unparsed in a canonical
945 format.
946 -- When doing macro destructuring, check to see if some part of a lambda-list
947 is a LIST before checking to see if it is a SYMBOL, because we want NIL to
948 act like the empty list, and not an attempt to bind NIL.
949 -- Fixed PACKAGE-ERROR to have a PACKAGE slot instead of a PATHNAME slot.
950 -- Changed DOLIST not to introduce the spurious let around the result form
951 when there is no result form. Also, just read the var in the spurious
952 let, instead of using IGNORABLE, since the var might be special.
953 -- In complex DEFSETF, don't bother creating temp vars for constants. This
954 is necessary so that keywords stay keywords, and are not changed to
955 gensyms.
957 Enhancements:
958 -- Changed the backquote expanded functions (backq-list, ...) from being
959 inline functions to compiler-macros, since although the optimizer does
960 eventually get the right code, it has to work awful hard. Changed BREAK
961 to accept a condition as well as a format string.
963 been forgotten before. Added code to CONNECT-TO-UNIX-SOCKET so that Unix
964 domain sockets are available for connecting to other processes.
965 -- Removed sys:*task-data* and sys:*task-notify* because they aren't used
966 even under Mach.
970 Release notes for CMU Common Lisp 16e, 5 August 92
972 16e is primarily a bug-fix release. The main changes from 16d are:
973 -- CLOS support is from March 92 PCL (2a). This is a new version of PCL
974 developed by Richard Harris which incorporates many bug-fixes and ANSI
975 compliance cleanups. He has also back-merged the CMU changes into his
976 sources so that we can release future PCLs without time-consuming merging.
977 On the downside, there are a couple of new bugs (discrimination on
978 pcl::structure-object doesn't always work; generic functions which contain
979 methods which discriminate on both null and list sometimes do not work).
980 Patches for these bugs are available in March-92-PCL-bugs in the CMU CL
981 release area and by anonymous ftp from host parcftp.xerox.com
982 (, in the directory pub/pcl/.
983 -- TRACE has been reimplemented, has a new syntax and new features.
984 -- The hardcopy and info documentation has been updated. Note that it
985 describes some debugger capabilities (breakpoints) which won't appear
986 until version 17.
988 The fasl file format is the same as for 16d, but some code may need to be
989 recompiled. In particular, the expansion of PPRINT-LOGICAL-BLOCK has changed.
992 March 92 PCL highlights: (see notes.text in the sources for details)
993 -- This version of PCL is much closer than previous versions of PCL to the
994 metaobject protocol specified in "The Art of the Metaobject Protocol",
995 chapters 5 and 6, by Gregor Kiczales, Jim des Riveres, and Daniel G.
996 Bobrow.
997 -- You can use structure-class as a metaclass to create new classes.
998 Classes created this way create and evaluate defstruct forms which
999 have generated symbols for the structure accessors and constructor.
1000 -- Various optimization of instance variable access, both inside and outside
1001 of methods.
1002 -- More work (lookups and precompilation) is done at compile and load time,
1003 rather than run-time.
1006 New TRACE:
1008 Trace has been substantially rewritten, and has a new syntax as well as new
1009 functionality:
1010 -- Tracing of compiled functions is now implemented using breakpoints.
1011 Breakpoints destructively modify the code object, causing all calls to the
1012 function to be trapped, instead of only those calls that indirect through
1013 the symbol. This makes TRACE more useful for debugging programs that use
1014 data structures containing function values, since you can now trace
1015 anonymous functions and macros. Also, the breakpoint stops the function
1016 after the arguments have been parsed, so arguments can accessed by name in
1017 the debugger or in TRACE options.
1018 -- Depending on the ENCAPSULATE option and DEBUG:*TRACE-ENCAPSULATE-DEFAULT*,
1019 encapsulation may be used instead. This is the default for closures,
1020 generic functions and interpreted functions.
1021 -- TRACE options are no longer set off by extra parens, and you can specify
1022 global trace options which affect all functions traced by a particular
1023 call to TRACE.
1024 -- Conditional breakpoints now work much better than before.
1025 -- *DEBUG-PRINT-LEVEL*, -LENGTH* are used instead of a separate
1026 *TRACE-PRINT-LEVEL*, etc.
1028 Here is the documentation string (see also the hardcopy/info documentation):
1029 TRACE {Option Global-Value}* {Name {Option Value}*}*
1030 TRACE is a debugging tool that prints information when specified functions
1031 are called. In its simplest form:
1032 (trace Name-1 Name-2 ...)
1034 TRACE causes a printout on *TRACE-OUTPUT* each time that one of the named
1035 functions is entered or returns (the Names are not evaluated.) The output
1036 is indented according to the number of pending traced calls, and this trace
1037 depth is printed at the beginning of each line of output.
1039 Options allow modification of the default behavior. Each option is a pair
1040 of an option keyword and a value form. Options may be interspersed with
1041 function names. Options only affect tracing of the function whose name they
1042 appear immediately after. Global options are specified before the first
1043 name, and affect all functions traced by a given use of TRACE.
1045 The following options are defined:
1047 :CONDITION Form
1050 If :CONDITION is specified, then TRACE does nothing unless Form
1051 evaluates to true at the time of the call. :CONDITION-AFTER is
1052 similar, but suppresses the initial printout, and is tested when the
1053 function returns. :CONDITION-ALL tries both before and after.
1055 :WHEREIN Names
1056 If specified, Names is a function name or list of names. TRACE does
1057 nothing unless a call to one of those functions encloses the call to
1058 this function (i.e. it would appear in a backtrace.) Anonymous
1059 functions have string names like "DEFUN FOO".
1061 :BREAK Form
1062 :BREAK-AFTER Form
1063 :BREAK-ALL Form
1064 If specified, and Form evaluates to true, then the debugger is invoked
1065 at the start of the function, at the end of the function, or both,
1066 according to the respective option.
1068 :PRINT Form
1069 :PRINT-AFTER Form
1070 :PRINT-ALL Form
1071 In addition to the usual prinout, he result of evaluating Form is
1072 printed at the start of the function, at the end of the function, or
1073 both, according to the respective option. Multiple print options cause
1074 multiple values to be printed.
1076 :FUNCTION Function-Form
1077 This is a not really an option, but rather another way of specifying
1078 what function to trace. The Function-Form is evaluated immediately,
1079 and the resulting function is traced.
1082 If T, the tracing is done via encapsulation (redefining the function
1083 name) rather than by modifying the function. :DEFAULT is the default,
1084 and means to use encapsulation for interpreted functions and funcallable
1085 instances, breakpoints otherwise. When encapsulation is used, forms are
1086 *not* evaluated in the function's lexical environment, but DEBUG:ARG can
1087 still be used.
1089 :CONDITION, :BREAK and :PRINT forms are evaluated in the lexical environment
1090 of the called function; DEBUG:VAR and DEBUG:ARG can be used. The -AFTER and
1091 -ALL forms are evaluated in the null environment.
1094 Assorted bug fixes and enhancements:
1096 System code:
1097 -- Changed default base file name for LOAD-FOREIGN to be argv[0] rather than
1098 being hard-wired to "lisp".
1099 -- Fixed a bad declaration which caused garbage collection to fail if more
1100 than MOST-POSITIVE-FIXNUM bytes had been consed since process creation.
1101 -- Changed GET-INTERNAL-RUN-TIME to use UNIX-FAST-GETRUSAGE to avoid
1102 number-consing and generic arithmetic. Also, rearranged the computation
1103 so that the time is correctly computed for up to 457 days, instead of only
1104 71 minutes.
1105 -- Merged Miles' fix to MAKE-PATHNAME so that it knows the difference between
1106 an arg being NIL and being unsupplied.
1107 -- Some partial fixes to circular printing (the #1=#1# bug).
1108 PPRINT-LOGICAL-BLOCK no longer checks the list argument for CAR
1109 circularity, now that OUTPUT-OBJECT does it for us.
1110 -- Fixed reader dispatch macro characters to be case-insensitive, and to
1111 disallow digits as sub-characters.
1112 -- Changed #A reader to allow arbitrary sequences instead of just lists.
1113 -- RUN-PROGRAM now gives a proper error message when "fork" fails (i.e. too
1114 many processes.)
1115 -- Fixed a bug in initialization of saved cores which caused the old
1116 environment to be left on the end of EXT:*ENVIRONMENT-LIST*. One symptom
1117 was that RUN-PROGRAM would run programs with strange environment values
1118 based on those in effect at the time the core was saved. In particular,
1119 Lisp subprocesses (i.e. Hemlock slaves) might get the wrong value of
1120 CMUCLLIB, which caused the slave to die before connecting.
1121 -- SYSTEM:SERVE-EVENT (and XLIB:EVENT-CASE, etc.) now correctly handle
1122 non-integer timeouts. Added declarations to improve the efficiency of
1123 event handling.
1124 -- Fixed some bugs in UNIX-SELECT which could cause Lisp to hang when more
1125 than 32 files were open. Also, improved efficiency in this case.
1126 -- Merged Olssons fix to WITH-ENABLED-INTERRUPTS to not try to change
1127 interrupt characters anymore.
1128 -- A number of bug-fixes for breakpoint support in compiled code (but there
1129 are still problems with arbitrary breakpoints.)
1130 -- Fixed DI:FRAME-CATCHES
1132 CLX:
1133 -- Fixed the implementation-dependent pixarray copying routines (for
1134 GET-IMAGE, etc.) so that they don't occasionally trash memory, and are
1135 actually faster.
1136 -- Fixed the definition of the ANGLE type (used by DRAW-ARC, etc.) to work
1137 regardless of the kind of real number (single or double float, rational,
1138 etc.)
1139 -- Fixed several places in image operations where values that could really
1140 be negative were declared to be non-negative.
1142 Compiler:
1143 -- Fixed a bug which caused an internal error whenever a call to random
1144 was compiled and the argument type wasn't known to be either a float or
1145 an integer.
1146 -- Fixed a bug which caused an internal compiler error when a value that
1147 wasn't used had an unproven type assertion.
1148 -- Fixed some more dead-code deletion bugs.
1149 -- Fixed a problem with the new "assignment" optimization of local function
1150 call where the compiler could get assertion failures such as tail-sets not
1151 being equal.
1152 -- Fixed a few places where reoptimization wasn't being triggered when it
1153 should have been.
1154 -- You can now have a TAGBODY with more than one tag that is non-locally
1155 exited to. Evidently this never worked...
1156 -- Some changes in debug-info format related to breakpoint support.
1158 Misc:
1159 -- Fixed some Hemlock Dired commands to know that PATHNAME-DIRECTORY is
1160 now a list, not a vector.
1161 -- Fixed the bin/sample-wrapper script to use "$@" instead of $* so that
1162 arguments are properly passed through.
1165 Release notes for CMU Common Lisp 16d, 30 May 92
1167 16d is our first version 16 general release, and incorporates many changes not
1168 present in the 15 series. It is currently fairly close to our current
1169 internal development (alpha) systems, and is thus less stable. The major
1170 changes are:
1171 New Aliens
1172 New pathnames
1173 New pretty printer
1174 New format
1175 R5.0 CLX.
1176 5/1/90 May Day PCL (REV 4b)
1177 Revised manual
1179 The fasl file format is nominally compatible with version 15, but the pathname
1180 change affects any pathname constants in fasl files, which includes the
1181 defined-from information present in every fasl file. It is probably a good
1182 idea to recompile everything.
1184 CLX and Hemlock are now optional. When CMU CL is installed, the maintainer can
1185 elect not to load CLX and Hemlock -- this saves 7 megabytes of disk and
1186 improves memory usage somewhat. See the installation section of the README
1187 file for details.
1189 The ``CMU Common Lisp User's Manual'' has been updated to be more helpful for
1190 non-CMU users. The new manual also documents the new Alien facility for
1191 foreign function calls and data structure access. The manual is now formatted
1192 with Mike Clarkson's LaTeXinfo package, so a consistent version of the
1193 documentation is available online in Gnu info format. See `doc/cmu-user.ps'
1194 and `doc/cmu-user.info'.
1197 General system code:
1199 ANSI cleanups:
1200 -- ANSI Compiler macros are now implemented: see COMPILER-MACRO-FUNCTION,
1202 -- Fixed things that invoke *MACROEXPAND-HOOK* to coerce it to a function
1203 before calling it.
1204 -- Fixed MACRO-FUNCTION to take an environment argument.
1205 -- SYMBOL-MACROLET now accepts declarations.
1206 -- SHADOW now accepts strings in addition to symbols.
1208 -- IGNORABLE is now in the LISP package instead of the EXT package.
1209 -- ADJUST-ARRAY has been updated to allow adjusting of arrays which were
1210 not created with :adjustable non-nil to be adjusted to new dimensions.
1211 -- ADJUSTABLE-ARRAY-P has been updated correspondingly. It returns T if
1212 adjust ADJUST-ARRAY would return an EQ array.
1213 -- The BASE-CHARACTER type has been renamed to BASE-CHAR.
1214 -- The REAL type and REALP function are now implemented.
1215 -- Changed the default structure printer to print slot names as keywords
1216 instead of unqualified symbols.
1218 Enhancements:
1219 -- Added MAYBE-INLINE declaration for GET, PUT, etc., so that these
1220 functions can be inline expanded according to the compilation policy.
1221 -- Added some type declarations so that GET-INTERNAL-REAL-TIME doesn't cons.
1222 -- Process the command line before printing the herald so that we can eval
1223 some form and quit without printing anything.
1224 -- SET now protects against setting T, NIL, and keywords. (SETF
1225 SYMBOL-FUNCTION) now expands into FSET, which protects against defining
1226 NIL.
1227 -- Substantially rearranged function describing to make it more consistent,
1228 and added support for describing interpreted functions.
1229 -- PURIFY is now called multiple times during system building to improve
1230 locality.
1231 -- (EVAL-WHEN (EVAL) ...) is now actually eval'ed.
1233 Bug fixes:
1234 -- Fixed bug in NTH-VALUE where it expanded into bogus code unless ``n'' was
1235 a constant integer.
1236 -- Fixed FMAKUNBOUND to return the symbol instead of T.
1237 -- Allocate memory as executable so that the OS knows to maintain cache
1238 consistency.
1239 -- Changed DESCRIBE to allow T or NIL as the stream argument.
1241 Load enhancements and cleanups:
1242 -- The initial value of *LOAD-VERBOSE* is now T. Additionally, LOAD no
1243 longer always binds *LOAD-VERBOSE* and *LOAD-PRINT*. Now it only
1244 binds them when :VERBOSE or :PRINT are explicity supplied. Therefore, you
1245 can set either of these in your init file and it will take effect.
1246 -- Normally when *LOAD-VERBOSE* is T, only the file name is printed.
1247 Formerly, the loaded stream was always printed, whereas now a stream is
1248 printed only when the stream is not a file stream.
1249 -- Added ANSI features *LOAD-TRUENAME*, *LOAD-PATHNAME* and *LOAD-PRINT*.
1250 -- As per ANSI, bind *READTABLE* to itself to make assignments file-local.
1251 -- Added new variables EXT:*SOURCE-FILE-TYPES* and EXT:*OBJECT-FILE-TYPES*.
1252 When no file type is specified, LOAD tries the types in these lists to
1253 locate the source and object files. LOAD now recognizes source types "l",
1254 "cl" and "lsp" in addition to "lisp".
1255 -- The compiler OPTIMIZE policy is now bound during load, so proclamations in
1256 a file don't leave the global policy clobbered when the load is finished.
1257 -- Changed the :IF-SOURCE-NEWER option to signal an error and use restarts,
1258 rather than PROMPT-FOR-Y-OR-N. Fixed the load source case to actually
1259 load the source, rather than loading the object as a source file...
1260 -- Changed load to deal with source files having NIL type more reasonably.
1261 -- If a wild pathname is given to LOAD, all files matched will be loaded.
1262 -- Proceeding from nonexistent file errors has been improved. It is no longer
1263 assumed that missing files are always source files. Added condition
1264 restarts for missing files.
1265 -- Improved formatting of error and warning messages.
1268 Garbage collection:
1269 -- Changed the minimal ROOM output to include all easily computed information
1270 including whether GC is disabled. The verbose ROOM now conses less.
1271 -- Removed the :ENABLE-GC SAVE-LISP option, as it's no longer needed.
1272 Garbage collection is now correctly enabled in cores which have been saved
1273 and then restarted.
1274 -- Added EXT:BYTES-CONSED-BETWEEN-GCS, a function that returns (and sets when
1275 used with setf) *BYTES-CONSED-BETWEEN-GCS*. Additionally, it changes
1276 *GC-TRIGGER* immediately to reflect the new values of *bytes-consed...*.
1277 -- TIME now displays the GC run-time.
1278 -- Added EXT:*GC-RUN-TIME* with accumulates the INTERNAL-RUN-TIME spent doing
1279 garbage collection. Added declarations to make EXT:GET-BYTES-CONSED more
1280 efficient.
1281 -- The top-level REP loop now zeros the unused non-zero portion of the
1282 control stack to discourage spurious garbage retention.
1283 -- The garbage collector now closes open file streams when it reclaims them.
1286 Packages:
1287 -- The LISP and USER packages have been renamed to COMMON-LISP and
1288 COMMON-LISP-USER. LISP and USER are nicknames, so they can still be used.
1289 -- The LISP package namespace has been cleaned up somewhat. For example,
1290 *DESCRIBE-PRINT-LEVEL* is no longer exported from LISP.
1291 -- The Mach/Unix division in the package system has been clarified a great
1292 deal. Unix specific features have been moved from the MACH package to the
1293 UNIX package. Mach specific features have been left in (or moved to) the
1294 MACH package. For example, all standard Unix syscalls are related
1295 definitions are un UNIX, whereas vm_statistics remains in MACH and GR-CALL
1296 has been moved to MACH.
1298 SETF cleanups:
1299 -- Changed GET-SETF-METHOD-MULTIPLE-VALUE to try to macroexpand-1 the form
1300 when it's an atom in case it's a symbol-macro as per the X3J13 cleanup
1302 symbol macros where the macroexpansion has side effects.
1303 -- Fixed SETF of GETF to evaluate the various parts in the correct order as
1306 Extend the semantics of the macros SETF, PSETF, SHIFTF, ROTATEF, and
1307 ASSERT to allow "places" whose SETF methods have more than one "store
1308 variable". In such cases, the macros accept as many values from the
1309 newvalue form as there are store variables. As usual, extra values
1310 are ignored and missing values default to NIL.
1311 -- Extended the long form of DEFSETF to allow the specification of more
1312 than one "store variable", with the obvious semantics.
1313 -- GET-SETF-METHOD signals an error if there would be more than one
1314 store-variable.
1317 Printer:
1319 Almost all of the printing code has been rewritten/restructured to support
1320 all of the printing features added to the language. Some highlights:
1321 -- *PRINT-READABLY* is now supported.
1322 -- *PRINT-CIRCLE* works irrespective of *PRINT-PRETTY*. Note: the default
1323 structure printer currently does not work when *PRINT-CIRCLE* is true: you
1324 get #1=#1#.
1325 -- *PRINT-LEVEL* abbreviation now works automatically inside structure
1326 printers.
1327 -- XP has been replaced with a native pretty printer that is fully
1328 integrated with the rest of the system. This Supports the ANSI
1329 pretty-printing interface instead of the old Waters XP interface. Existing
1330 uses of the old interface will need to be updated to use the new names.
1331 -- The pretty-printer now unparses backquote forms on printing. To retain
1332 this information, the backqoute read macro no longer expands into LIST,
1333 CONS, etc. Internal functions are used instead.
1335 been added.
1336 -- All new format. Supports the FORMATTER macro and all the pretty-printing
1337 directives. FORMAT has extended to accept a function as the format control
1338 (as an alternative to a string.)
1339 -- Added support for READTABLE-CASE in symbol printing. Printing when
1340 *PRINT-CASE* is :CAPITALIZE and *PRINT-ESCAPE* is NIL is now slightly
1341 different than before. Added some missing array type declarations in
1342 symbol printing.
1344 Bug fixes:
1345 -- Fixed a bug which caused some float printing format directives to
1346 infinitely loop when a fixed-width field overflowed.
1347 -- Specify stream when printing unbound marker.
1348 -- Fixed FORMAT to override printer control variables when printing float
1349 exponents so that they are always printed in decimal, etc.
1352 Reader:
1354 ANSI Cleanups:
1355 -- *READ-EVAL* is now supported. If a #. is encountered while *READ-EVAL*
1356 is NIL (default T), an error is signaled. This intended to allow
1357 ``secure'' READ-based command interfaces to be written.
1358 -- READTABLE-CASE is now supported.
1359 -- The reader now signals the correct type of error when things go wrong
1360 instead of always signaling a simple-error.
1361 -- Changed the return value of SET-SYNTAX-FROM-CHAR from NIL to T as per X3J13
1362 cleanup RETURN-VALUES-UNSPECIFIED:SPECIFY. [Hard to believe nobody has
1363 complained about not conforming to this one.]
1365 Bug fixes:
1366 -- Fixes to several bugs with respect to #+, #-. In particular, stacked
1367 conditionals like "#+foo #-bar baz" now work
1368 -- #n= and #n# now detect more error conditions and work on structures.
1369 -- # is now a non-terminating macro character, so foo#bar is read as a
1370 symbol.
1371 -- Added Ted's changes to make INTERNAL-READ-EXTENDED-TOKEN work when there
1372 are `|' escapes. The main significance of this is that #+nil '|foo;bar|
1373 and #:|foobar| now work properly. Also changed this function to recognize
1374 unquoted colons so that #:foo:bar will error, but not #:foo\:bar.
1376 Enhancement:
1377 -- Export new variable *ignore-extra-close-parentheses* if true (the default),
1378 extra close parens are only a warning, not an error. Previously unmatched
1379 close parens were quietly ignored.
1382 Pathnames:
1384 This release supports all the new CltL2 pathname features except for logical
1385 pathnames. Following is an overview of the new pathname support.
1387 Programs that actually conform to the CLtL1 pathname spec will have very few
1388 problems. However, the CLtL1 spec was extremely vague, and CMU CL did not
1389 make use of much of the allowed flexibility, so many technically non-portable
1390 programs previously worked under CMU CL.
1392 The main incompatible changes from CLtL1 to CLtL2:
1393 -- Symbols are no longer acceptable filenames.
1394 -- PATHNAME-HOST may be any object.
1395 -- :UNSPECIFIC is now a legal pathname component.
1396 -- MERGE-PATHNAMES now recognizes relative pathnames and treats them
1397 specially.
1399 The format of directories is now specified (to be a list in a certain format.)
1400 This required an incompatible change from the previous practice of using a
1401 vector PATHNAME-DIRECTORY and using "DEFAULT" or :ABSOLUTE in the
1402 PATHNAME-DEVICE to indicate relative and absolute pathnames.
1404 In a related change, the CMU SEARCH-LIST extension was changed so that the
1405 search-list now appears in the PATHNAME-DIRECTORY as:
1406 (:ABSOLUTE #<Search-list "name"> ...)
1408 Other changes to search-lists:
1409 -- (SETF SEARCH-LIST) now accepts a string or pathname, and converts it into
1410 a one-element list.
1411 -- Search-list elements are now canonicalized to pathnames rather than to
1412 strings.
1413 -- Instead of returning NIL, SEARCH-LIST now signals an error when it is
1414 called on an undefined search list.
1415 -- SEARCH-LIST-DEFINED-P is a predicate that tells if the search list is
1416 currently defined.
1418 New features which are now supported:
1419 -- Wildcard pathnames are now fully supported. In addition to allowing :WILD
1420 in any pathname component, "extended wildcards" such as "foo*.*" are also
1421 supported. A consequence of this is that PATTERN objects may appear in
1422 wildcard pathname components instead of strings. See PATHNAME-MATCH-P and
1424 -- As a CMU CL extension, a wildcard pathname may be used as the argument to
1425 any filesystem interface (like OPEN) as long as it matches only one file.
1426 -- The pathname :COMMON case mechanism provides a way around the problems of
1427 portably specifying string pathname components in the presence of operating
1428 systems with differing preferred case in their filesystem. An uppercase
1429 string "LISP" is mapped to the "customary case" (lowercase on unix.)
1430 Lowercase is also inverted: "readme" becomes "README". Mixed case is left
1431 alone. Note that this mechanism is explicitly enabled by supplying :CASE
1432 :COMMON to functions such as MAKE-PATHNAME. The default is the old
1433 behavior (:CASE :LOCAL).
1435 Also, DIRECTORY now actually returns the TRUENAME of each file (as it was
1436 always supposed to do.) If a matched file is a symbolic link, the truename may
1437 be a file in some other directory that doesn't even match the pattern. The old
1438 behavior can be obtained by specifying :FOLLOW-LINKS NIL.
1440 The new wildcard pathname mechanism has not yet been used to replace the old
1441 single-wildcard matching in Hemlock DIRED, etc.
1444 Debugger:
1445 -- Added Miles' changes to keep errors and warnings on one line if they fit.
1446 -- The debugger now starts up with the error frame as the current frame, so
1447 it is no longer necessary to manually skip over internal frames resulting
1448 from the error system invocation.
1449 -- Fixed some debugger bugs that appeared when debugging interpreted code.
1450 -- Added ``DESCRIBE'' debugger command.
1451 -- Merged Miles' changes that allow the use of restart names as debugger
1452 commands.
1453 -- Changed SHOW-RESTARTS to also display the restart name (but only if it's
1454 not shadowed by a higher priority restart). Changed the restart command
1455 to look for restarts by name if a symbol is typed.
1456 -- Bind *CURRENT-LEVEL* to 0, *PRINT-READABLY* to nil, and *READ-EVAL* to T
1457 when entering the debugger to make sure things print as expected.
1459 The debugger programmer (DEBUG-INTERNALS) interface is now documented in the
1460 User's Manual. This interface allows the coding of debuggers and debugger
1461 extensions without requiring an intimate understanding of the compiler and
1462 run-time system. Be warned that DI features (such as breakpoints) not used by
1463 the current debugger may not work very well (wait for version 17.)
1465 Debug internals changes:
1466 -- DI:DEBUG-FUNCTION-FUNCTION is now implemented.
1467 -- Added DI:FLUSH-FRAMES-ABOVE for cleaning up frames to be bound to
1471 Defstruct:
1473 Various fixes and enhancements to defstruct slot parsing and inclusion.
1474 It now works to define structures such as:
1475 (defstruct super a)
1476 (defstruct (sub1 (:conc-name super)) one)
1477 (defstruct (sub2 (:conc-name super)) two)
1478 (super-a (make-sub1))
1480 previously, a definition such as for SUB2 would define SUPER-A to be a
1481 SUB2-specific function, which could then no longer be used on other types. The
1482 spec doesn't clearly say that such a construct is legal, but its use seems
1483 fairly common.
1485 Also, slot parsing is now more rigorous. Unrecognized slot options cause an
1486 error, as does a slot spec like: (defstruct foo (a :type t))
1488 Fasl dumping of constant structures has been fixed to conform to X3J13. The
1489 main significance of this is that DEFSTRUCT structures are no longer dumpable
1490 by default. However, the generic function MAKE-LOAD-FORM isn't really used.
1491 Instead, a new defstruct option, :MAKE-LOAD-FORM-FUN, has been added that can
1492 be used to specify a function that acts like a MAKE-LOAD-FORM method. When we
1493 have a CLOS that supports STRUCTURE-CLASS, the default method for
1494 MAKE-LOAD-FORM will use this information instead of having the compiler use it
1495 directly. The old behavior can be enabled on a structure by structure basis by
1496 using the :MAKE-LOAD-FORM-FUN defstruct option:
1497 (defstruct (foo (:make-load-form-fun :just-dump-it-normally))
1498 ...)
1501 Compiler:
1503 Cleanups:
1504 -- Added the LOAD-TIME-VALUE support special form.
1505 -- Displaced or adjustable arrays and vectors with fill pointers can now be
1506 dumped in fasl files, but are converted to simple array with the same
1507 elements.
1508 -- Arrays of floats are left as arrays of floats instead of being
1509 converted into arrays of element-type T that just so happen to hold a
1510 bunch of floats.
1511 -- Changed IGNORE and IGNORABLE to recognize #'fn-name for declaring that
1512 local functions are not used. Exported IGNORABLE from LISP.
1514 New optimizations:
1515 -- Iterations written using tail recursion are now optimized through a
1516 special-casing of local functions where all calls but one are
1517 tail-recursive self-calls. Such functions are compiled with no
1518 environment manipulation, resulting in the same code as explicit
1519 iteration.
1520 -- Loop rotation (Knuth "while" loop optimization) been added. This is the
1521 optimization that negates the loop exit test and places it at the end of
1522 the loop, and then jumps there at loop entry. Note that this is part of
1523 control optimization, and not simply a recoding of certain iteration
1524 macros. In fact, for historical reasons DO, etc. already had the exit
1525 test negated, but the compiler was cleverly un-negating the test.
1526 -- Flow analysis now recognizes function calls and special forms which do
1527 not yield any value because they unwind or signal an error. This results
1528 in improved code for error checks, since the compiler can get by with
1529 fewer unconditional branches. A function can be declared not to return by
1530 declaring its result type to be NIL (not to be confused with NULL). If a
1531 function declared NIL does return, an error will be signalled.
1532 -- Added derive-type methods for ASIN, ACOS, ACOSH, ATANH and SQRT which
1533 figure out whether the result type is real on the basis of the argument
1534 range. Also, the result of ATAN is always real, so we don't need a result
1535 type assertion.
1536 -- Added optimization which deletes MULTIPLE-VALUE-BINDs when all
1537 variables have been deleted.
1538 -- Eliminated some spurious checking of the result types of safe VOPs (such
1539 as the SPARC tadd for fixnum arithmetic.)
1540 -- Transform uses of the SEARCH generic sequence function on simple strings
1541 into a call to a more efficient string-specific function.
1542 -- Added multiplier recoding of (UNSIGNED-BYTE 32) multiplication. This
1543 converts 32 bit (or smaller) unsigned multiplication by any compile-time
1544 constant into a shift-add sequence. This is much faster when the constant
1545 is a near power of two or when general multiplication is slow (as on the
1546 SPARC.)
1547 -- Added comprehensive handling of arithmetic and logical identities when
1548 an arg is -1, 0 or +1.
1549 -- Added a RANDOM derive-type method: (random 13) is (integer 0 12).
1552 Enhancements:
1553 -- Changed the compiler to temporarily increase *BYTES-CONSED-
1554 BETWEEN-GCS* by a factor of 4 during compilation of each top-level form,
1555 instead of turning off all garbage collection.
1556 -- Bind *PRINT-LINES* around compiler error output to
1558 -- Do not warn about undefined variables, functions or types when the
1560 -- Some optimizations are now considered "important"; failure of important
1561 optimizations causes an efficiency note even when speed=inhibit-warnings
1562 (i.e. by default.)
1563 -- Print a error summary even when *COMPILE-VERBOSE* is false. (This is only
1564 printed when there are errors, so this doesn't seem a violation of the
1565 spirit of the spec.)
1567 Bug fixes:
1568 -- Merged Miles' fix to disassembly of the MIPS coprocessor move instructions.
1569 -- Fixed spelling of "efficency" in exported variables such as
1571 -- Fixed some cases where incomplete optimization could happen.
1572 -- Fixed some arithmetic "identities" that failed to preserve the sign of
1573 -0.0.
1574 -- Fixed TYPES-INTERSECT to consider any supertype of T to definitely
1575 intersect with anything (even an unknown type.)
1576 -- Fixed a problem where inconsistent declarations could fail to be detected
1577 at compile time.
1578 -- Fixed the VALUES transform (which discards unused subforms) to work
1579 on (VALUES).
1580 -- More bug fixes to dead code deletion.
1581 -- Fixed a problem where a special binding would not be removed on exit from
1582 the scope if there was no code in the scope (e.g. it had all been
1583 deleted.)
1584 -- Fixed handling of named (DEFCONSTANT) constants so that EQ
1585 relationships are properly preserved.
1588 Extensions:
1590 -- Export FEATUREP from EXT. This takes a feature expression and tests it
1591 against the value of *FEATURES*. Allow LISP:AND, LISP:OR, and LISP:NOT in
1592 features lists in addition to :AND, :OR, and :NOT. This makes featurep
1593 useful outside of #+ and #-.
1594 -- The encapsulation mechanism (similar to advise facilities) has been
1595 revamped to work on SETF function names as well as symbols.
1597 Returns whatever definition is stored for name, regardless of whether
1598 it is encapsulated. Unlike FDEFINITION, this does not strip off the
1599 encapsulation. This is SETF'able.
1601 Replaces the definition of name with a function that binds name's
1602 arguments a variable named argument-list, binds name's definition to a
1603 variable named basic-definition, and EVAL's body in that context. Type
1604 is whatever you would like to associate with this encapsulation for
1605 identification in case you need multiple encapsuations of the same
1606 name.
1608 Removes name's most recent encapsulation of the specified type.
1610 Returns t if name has an encapsulation of the given type, otherwise
1611 nil.
1613 A list of functions invoked by (SETF FDEFINITION) before storing the
1614 new value. Each hook function must take the function name and the
1615 new-value.
1617 Hemlock:
1618 -- Fixed the :FILE branch of "Help on Parse" to trim leading directory
1619 components off the pathname if it wouldn't otherwise fit on the screen.
1620 -- Fixed GET-EDITOR-TTY-INPUT to not assume that UNIX-READ will always work.
1621 -- When we reallocate string table vectors to grow them, clear the old vector
1622 so that it won't hold onto garbage (in case the vector was in static space,
1623 but pointed to dynamic values.) This was a major cause of memory leakage
1624 in Hemlock.
1625 -- Added a (setf (ts-stream-char-pos stream) 0) to the accept-input function
1626 so that char-pos will be reset to zero whenever the user presses enter.
1628 PCL:
1629 -- The version has been updated to "5/1/90 May Day PCL (REV 4b)".
1630 -- The Code walker now understands the real SYMBOL-MACROLET, and the PCL macro
1631 definition is no longer used.
1632 -- Fixed a bug in WALK-ARGLIST where it would ignore the rest of the current
1633 arglist if the current arg destructured. This was causing it to compile
1634 forms like:
1635 (macrolet ((foo ((a b) c) ...)) ...)
1636 as:
1637 (macrolet ((foo ((a b)) ...)) ...)
1638 note the loss of the arg c.
1641 System:
1643 -- All the SAP-REF-<n> functions now take byte offsets. Previously, the
1644 16 and 32bit versions were scaled by the element size.
1645 -- Fixed UNIX-IOCTL to not flame out of the cmd is a ub-32 instead of a sb-32.
1647 -- Unix syscalls are now more restrictive in the kind of arguments that they
1648 accept. In particular, UNIX:UNIX-READ, etc., no longer automatically
1649 accept a vector (or string) argument. You must use VECTOR-SAP to convert
1650 the vector to a system area pointer. Note that WITHOUT-GCING should be
1651 wrapped around any syscall which is passed a pointer to the Lisp heap,
1652 since the object might otherwise move doing the syscall.
1653 -- Changed LOAD-FOREIGN to be exported from ALIEN. Changed it have keyword
1654 args instead of optionals. Deleted obsolete linker argument.

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